Damage caused by different levels of artificial defoliation, simulating the leaf-cutting ants attack on young plantations of Pinus taeda and Eucalyptus grandis

Authors

  • Wilson Reis Filho Epagri
  • Franciele dos Santos Faculdades Integradas Espíritas
  • Priscila Strapasson Universidade Federal do Paraná, Departamento de Zoologia
  • Mariane Aparecida Nickele Universidade Federal do Paraná, Departamento de Zoologia

Keywords:

Damage levels, forest plantations, forest pests.

Abstract

The artificial defoliation allows to measure the defoliation intensity caused by insects. The objectives of this work were to evaluate the damages caused by leaf-cutting ants in young plantations of Pinus taeda and Eucalyptus grandis using different levels of artificial defoliation. A classification was established according to defoliation levels that were caused by leaf-cutting ants in P. taeda: level 1: 50%, level 2: 75%, level 3: 100% and level 4: 100%, including the cut of the apical meristem. And in E. grandis: level 1: 50% of defoliation; level 2: 75% and level 3: 100%. After one year, the P. taeda seedlings had losses in diameter and height for defoliation level above 75%. Seedlings severely defoliated (level 4), had losses of 37.0% in height and 45.4% in diameter. The E. grandis seedlings had losses since three months old and the reductions were proportional to the defoliation intensity. After one year, the losses of 13.3% in height and 20% in diameter were verified in plants with 100% of defoliation. P. taeda plants are more damaged by leaf-cutting attack.

doi: 10.4336/2011.pfb.31.65.37

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Author Biography

Wilson Reis Filho, Epagri

Embrapa Florestas - Lab de Entomologia

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Published

2011-03-24

How to Cite

REIS FILHO, Wilson; SANTOS, Franciele dos; STRAPASSON, Priscila; NICKELE, Mariane Aparecida. Damage caused by different levels of artificial defoliation, simulating the leaf-cutting ants attack on young plantations of Pinus taeda and Eucalyptus grandis. Pesquisa Florestal Brasileira, [S. l.], v. 31, n. 65, p. 37, 2011. Disponível em: https://pfb.sede.embrapa.br/pfb/article/view/175. Acesso em: 19 apr. 2025.

Issue

Vol. 31 No. 65 (2011): jan./mar.

Section

Articles

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